News and activity reports about Ruapehu volcano:
Ruapehu volcano (New Zealand): increased crater lake temerature and seismic activity
Wednesday Apr 17, 2019 22:10 PM | BY: LEO
The Ruapehu crater lake during winter. (image: GNS Science)Another phase of increased crater lake temperatures has been recorded at the Te Wai ā-moe (Crater Lake) Mt Ruapehu in combination with moderate levels of volcanic tremor.
For the last 10 years temperatures of the summit crater lake have cycled between ~15 and 45°C over 12 month periods. Since September 2018 lake temperatures have remained at ~30°C. Over the past two weeks the temperatures have risen again at a rate of 0.5°C per day, to 42°C on April 9. Consistant with previous periods heating cycles a moderate volcanic tremor has accompanied this rise in temperature.
Previously, eruptions have been observed to occur more frequently when the lake temperature exceed 45°C, although this was not the case in 2016 when a temperature of 46°C was observed with no eruption.
Both the Volcanic Alert Level (level 1) and Aviation Code (Green) remain unchanged.
Links / Sources:
Links / Sources:
- report from Geonet (Geonet - GNS Science)
Monday, Nov 07, 2016
Volcanic tremor (which is normally present at the volcano) has increased a notch since mid October, but not enough to trigger a raise in alert status of the volcano (which remains at level 1). New Zealand's GNS Science issued a note but does not expect the volcano to erupt soon. ... [more]
Friday, Sep 09, 2016
After reaching record-low temperatures in August, the volcano's closely-monitored crater lake has started to heat up very quickly since 2 September, Geonet reported. ... [more]
Friday, May 20, 2016
On 17 May GeoNet reported that the lake temperature of Ruapehu's summit Crater Lake had decreased from a high of 46 degrees Celsius to 39 degrees, with some of the decrease attributed to rain and snowfall. ... [more]
Friday, May 13, 2016
The alert level of the volcano was raised by a notch from 1 to Level 2 (moderate to heightened unrest) last Wednesday, Geonet informed in a special note. ... [more]